*) Support separate normal and dnd led brightness levels for battery
and notifications.
*) Move lineage-specific notification bundle extras definitions from fw/b
to LineageNotification here in the sdk.
*) In addition to the existing bundle extra EXTRA_FORCE_SHOW_LIGHTS, add
a new extra EXTRA_FORCE_LIGHT_BRIGHTNESS that can be used to override
the brightness level set by a Lineage system setting brightness level
on a per notification basis. This is used by the brightness sliders
in LineageParts that otherwise would have to juggle changing / restoring
the system led brightness setting whenever the a slider is on display.
*) Disable all lights in dnd mode when lineage setting ZEN_ALLOW_LIGHTS
is set to 0.
Change-Id: I917f402a291682b582f68c8324a33c461357dad9
c7a8ed54b5